const mysql = require("mysql");
var con = mysql.createConnection({
    host:'localhost',
    port:3306,
    user:'root',
    password:'',
    database:'cyw'
})
var userName = process.argv[2];
var age = process.argv[3];

var updateSql = "update users set age=? where userName=?";
con.query(updateSql,[age,userName],(err,result) => {
    if(err){
        console.log(err);
    }else{
        console.log(result)
    }
})